Marantec
Auto‑Reverse Triggered After Close or Misinterpreted Obstruction
Garage door opens normally but will not stay closed; it reopens a few seconds after closing.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Safety sensor beam interrupted at end of travel, Door bouncing off floor and triggering force reversal, Loose door cables or hardware causing rebound, Control board misreading travel completion
How to Fix / Troubleshooting
Safety first: Keep clear of the door while diagnosing repeated cycling.
- Watch sensors at close: Observe the sensor LEDs as the door reaches the floor. If they flicker or go out, adjust alignment and secure wiring.
- Check door contact: Ensure the door meets the floor smoothly without bouncing. Adjust down limit and force as needed.
- Inspect cables and hardware: Look for slack cables, loose bottom brackets, or damaged hinges that could cause the door to shift at the bottom.
- Re‑run travel learn: Perform a full travel and force setup on the Marantec opener so it correctly recognizes the closed position.
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Repair Difficulty
Medium
3/5
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